Slender-billed Greenbul (Stelgidillas gracilirostris) [XC207918]
by Bram Piot from Saimo Hills View Resort, Tugen Hills, Kenya (call)
Slender-billed Greenbul (Stelgidillas gracilirostris) [XC785444]
by Jaap van der Waarde from Gola Rainforest NP, Sierra Leone, Sierra Leone (call)
Subspecies
Genus formerly submerged in Pycnonotus. Old name "Stelgidillas poensis" is a synonym of present species. Affinities unclear and recent molecular data suggest that this species is remote from all other members of genus and would be better placed in a separate genus.
Proposed subspecies congensis (Cameroon east to DRCongo and Tanzania) and chagwensis (Uganda) exhibit barely perceptible and inconstant differences in colour tone from nominate, and not satisfactorily distinguishable.
The following 2 subspecies are recognised:
gracilirostris (Strickland, 1844) - South-western Senegal and Guinea-Bissau east, including Bioko I, to southern Sudan, central Uganda and western Kenya, south to north-western Angola, south-central DRCongo, Rwanda and northern Burundi, also western Tanzania.
percivali (Neumann, 1903) - Central Kenya Highlands.